Strainer-cleaning device.



No 836,056 PATENTED NOV. 13; 1906.

D. H. STAPLES.

STRAINER CLEANING DEVICE.

' APPLICATION FILED MAR.23. 1906.

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UNITED STATES PATENT OFFICE.

DAVID H. STAPLES, OF WATERVILLE, MAINE, ASSIGNOR TO GEORGE W.

WATSON, TRUSTEE, OF

BOSTON, MASSAOH U SETTS.

STRAlNER-CLEANING DEVICE.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed March 23 1906. Serial No. 307,626.

To all whom it may concern.-

Be it known that I, DAVID H. STAPLES, a citizen of the United States, residing at Waterville, in the county of Kennebec and State of Maine, have invented new and useful Improvements in Strainer-Cleaning Devices, of which the following is a specification.

The object of this invention is to provide a simple and efiicient means whereby the perforated surface of a strainer or of any straining device or apparatus may be cleansed, so that the perforations will not become clogged and lose their efficiency.

The fundamental principle of the device hereinafter described consists in one or more jets of compressed air, steam, or liquid, as may be desired, against the inner surface of a perforated strainer-plate, said perforated plate extending across the end of a pipe or nozzle and the fluidsuch as compressed air, steam, or Water-directed against the inner face of said plate by suitable means, as hereinafter set forth.

The invention consists in a device of the character described, of a nozzle, a perforated plate extending over one end thereof, and means to direct fluid against the inner face of said perforated plate.

The invention further consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

ile my improved device for cleaning strainers may be used for a variety of different purposes where it is desired to keep the perforations of a strainer-plate clear from dirt, it is particularly adapted for use in connection with a compressed-air-brake system where a nozzle with a strainer-plate extending across the inlet end thereof is attached to the supply-pipe of said system, and in the following specification I have illustrated my invention in the particular form adapted to such a system.

Referring to the drawings, Figure 1 is a side elevation of a nozzle and pipe or union with my improved strainer-cleaning device attached thereto. Fig. 2 is a section, partly in elevation, taken on line 2 2, Fig. 1, looking toward the left in said figure.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, Figs. 1 and 2, 5 is a nozzle directing provided with an inlet-orifice 5 and with an outlet-orifice 5 and having screw-threaded engagement with a pipe coupling or union 6. 7 is a perforated strainer-plate extending across the inlet end of the nozzle 5. Said nozzle and coupling correctly represent the inlet end of the air-supply pipe of a brake system in common use upon different locomotives, the same being generally located at the side of the locomotive. 8 is a tube leading into the interior of the pipe, consisting of an outlet-tip 9, connected by an elbow 10 to a supply-tube 11. The supply-tube 11 has screw-threaded engagement with the pipe 6 and is locked thereto by means of a set-nut 12. The tube 8 as a whole is connected to any suitable source of fluid-supply. When attached, however, to a locomotive and adapted for use in connection with the air-brake system referred to, it is preferable to connect said tube to the throttle-pipe of the pump or to any convenient source of fluid-supply. This fluid may be either compressed air, steam, or water, as may be most convenient, and the source of said supply when the device is used in connection with a locomotive is preferably controlled by a valve in the cab of the locomotive conveniently located.

The operation of my improved strainercleaning device is as follows: The air passing into the interior of the pipe 6 through the inletorifice of the nozzle 5 and through the perforations in the strainer 7 in the direction of the arrows at a, Fig. 2, carries with it dust and dirt, and said strainer under ordinary conditions soon becomes plugged up. When this is the case, the engineer opens the valve referred to, but not shown in the drawin s, and allows steam to pass from the throttf pipe of the pump through the tube 8 and out of the outlet-tip 9 of said tube in the direction of the arrow 7) into the interior of the nozzle and against the inner face of the perforated plate or strainer 7, thus forcing all dirt, grease, or obstructions of any kind out of the perforations in the strainer-plate and leaving the same perfectly clean, so that-the air may freely enter into the air-supply pipe 6 through the perforated plate 7 and nozzle 5.

Having thus described my invention, what I claim, and desire by Letters Patent to secure, is-

1. In a device of the character described,

a nozzle, a strainer extending over one end of said nozzle, a tube of smaller diameter than that of the interior of said nozzle eX- tending thereinto, and adapted to direct a jet of fluid against the inner face of said strainer. I

2. In a device of the character described,

a nozzle having an, inlet and an outlet orifree, a strainer extending over said inlet- 10 orifice, and means connected to said nozzle intermediate said inlet and outlet orifices adapted to direct a jet of fluid against the inner face of said strainer.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit- 15 nesses.

DAVID H. STAPLES.

Witnesses:

CHARLES S. GOODING, ANNIE J. DAILEY. 

